Flow Controller

The most effective modulation controller for GCxGC with thermal modulator currently available in the market.The Optimode, which is the central component of your two-dimensional chromatography system, was created by SRA Instruments. It regulates the modulation process and optimizes the collection and transfer of analytes from the first column to the second. The Optimode regulates the mass flow of the cold jet, which guarantees the retention of analytes within the modulation loop. A pulse of hot gas periodically desorbeds the compounds. It is imperative to maintain the repeatability of this period (modulation) in 2D imaging. New opportunities for the GCxGC are presented by the introduction of Optimode version 2:Improved modulation time accuracy and repeatability

multi-modulation management: optimization of the modulation time during the analysisOptimode is connected to the network (ethernet) in the same manner as the rest of your GC installation, and there is no need for software installation. The web programming interface is intuitive.

The Optimode employs the most advanced embedded electronics available to ensure precise time control. The initial pulse of hot gas is initiated within 2 milliseconds of the GC command. The modulation period is repeatable to a precision of 12.5 ns. The characteristic response time of the mass flow rate is less than 1 ms, and it is controlled on 8 bits (0.39 % sensitivity). Additionally, the clock drift is negligible (one part per 120,000, or 30 ms/h). The Optimode supports multi-modulation in addition to its exceptional performance. During the analysis, the hot air jet control parameters are adjusted in accordance with a predetermined table to ensure that the modulation process is finely optimized for the compounds under analysis.